CN1313651A

CN1313651A - Metal-air battery

Info

Publication number: CN1313651A
Application number: CN00103429A
Authority: CN
Inventors: 黄铭裕
Original assignee: ZHONGHUAN CO Ltd
Current assignee: ZHONGHUAN CO Ltd
Priority date: 2000-03-10
Filing date: 2000-03-10
Publication date: 2001-09-19
Anticipated expiration: 2020-03-10
Also published as: CN1127167C

Abstract

A metal-air battery with anode/electrolyte and air cathode is composed of container with an inner top surface and inner bottom surface, a spring on the inner top surface, a cover with at least one recess, and at least one ring on inner bottom surface. when a force is applied to it, the spring is compressed to separate the ring from the recess, forming an air entrance. The air comes in it to take part in electrochemical reaction. When the force is removed, the air entrance is closed.

Description

Metal-air battery

The present invention relates to a kind of electrochemical cell, it itself is the open system or the spring of closed system that particularly a kind of metal-air battery, this battery have in order to control.

Electrochemical cell, for example metal-air battery comprises a transparent negative electrode of air and a metal anode, and above-mentioned two electrodes are separated by aqueous electrolyte.Work as metal-air battery, zinc-air battery when discharge for example, be converted into hydroxyl ion from the oxygen of surrounding air at negative electrode, and zinc at anode by the hydroxyl ion oxidation, and then discharge water outlet and electronics so that electric energy to be provided.

Therefore, in order to operate metal-air battery, must provide oxygen (air) at the negative electrode of battery.The metal-air battery that various structures are arranged that has been used, for example Pendicin is at United States Patent (USP) 5,362, a kind of metal-air battery with packing container has been described in 577, this packing container comprises several openings so that the negative electrode of metal-battery is exposed to environment on every side, thereby makes it possible to pass through at the aitiogenic air of negative electrode.

Yet even when metal-air battery is not used, its negative electrode still is exposed among the air constantly, and this will cause metal-air battery constantly to discharge, thereby causes the performance and life-span of leaking electricity and reducing battery.

The purpose of this invention is to provide a kind of metal-air battery with spring and O-ring, it can produce an air intake, and to control battery be open system or shutdown system.

Metal-air battery of the present invention has an anode and a negative electrode and and places separator between above-mentioned two electrodes, this battery comprises: a container, this container have the top inner surface and a below inner surface of described anode of the seasoning of being used for and described negative electrode.One spring, this spring are arranged at described top inner surface; One lid, this lid is used for electrically connecting described negative electrode, and this lid has at least one depressed part; At least one O-ring, this O-ring are arranged at described below inner surface and towards described at least one depressed part; When applying a predetermined strength, described spring is compressed and makes described at least one O-ring separate with described at least one depressed part, produces electrochemical reaction thereby form an inlet to import air; When removing described predetermined strength, described at least one O-ring embeds described at least one depressed part and blocks air.

Moreover according to metal-air battery of the present invention, described container can be a tank container.

And according to metal-air battery of the present invention, it may further include a ventilated membrane, this ventilated membrane be arranged at described negative electrode around and along the internal side wall of described container, so that prevent moisture content effusion battery.And described ventilated membrane can comprise a hydrophobic material.

Secondly, according to metal-air battery of the present invention, wherein said anode can be made of zinc, and negative electrode is made up of the catalyst of for example manganese dioxide.

Below in conjunction with drawings and Examples in detail the present invention is described in detail.

Fig. 1 is the cutaway view of metal-air battery when not using of the embodiment of the invention;

Fig. 2 is the battery storage cutaway view that is applicable to the metal-air battery of the embodiment of the invention;

Fig. 3 is for being positioned over metal-air battery shown in Figure 1 cutaway view in the battery storage shown in Figure 2.

Embodiment

As Fig. 1, metal-air battery of the present invention shown in Figure 3, it comprises anode 12, air cathode 16 and places separator 14 between two electrodes.Described metal-air battery can be a zinc-air battery, and certainly, also available other metals replace zinc.

Label 30 expression has the container of top inner surface US and below inner surface LS, and this container is used for seasoning muddy anode 12 and the air cathode 16 that comprises catalyst (for example manganese dioxide) and carbon black.In this embodiment, described container 30 is a jar shape, yet it also can be other shapes.Rubber-like spring 24 is set at the top inner surface US of container 30, and between crown cap 22 and anode cover 26.And plastic sealing material 20, for example polyester material is adhered on anode 12 and the air cathode 16.Be formed on the central portion of described container 30 and be used for the conductor 10 of collected current, and between crown cap 22 and epoxy resin lid 36.

Conductor 38 is provided with along epoxy resin lid 36, and this conductor extends the outer surface of air cathode 16 and electrically connects to collect its electric current with air cathode 16.The negative electrode lid 40 that comprises as shown in Figure 3 annular recess 42 and top 43 is adhered on the conductor 38.And, be preferably in air cathode 16 around the hydrophobic material ventilated membrane 18 for example be made of polymeric material is set, make ventilated membrane 18 between the internal side wall and air cathode 16 of container 30, be used for avoiding electrolyte to leak outside and/or moisture this battery of overflowing.O-ring 28 is arranged on the inner surface LS of below, and this O-ring 28 is aimed at and towards described annular recess 42.And neutral cover (neutralcover) 32 and metal contracts paster 34 are set avoids short circuit to damage with outside to protect described metal-air battery.

As shown in Figure 2 can the contact external circuit battery storage 50, it has a storage spring 52 and an eyelid retractor 54.In the present embodiment, the function of eyelid retractor 54 is, when metal-air battery is placed in battery storage 50, applies a predetermined strength in the top 43.Yet the present invention is not as limit, and described predetermined strength can have other source.

As shown in Figure 1, when described metal-air battery did not use, spring 24 can be expanded and make O-ring 28 embed described annular recess 42, thereby blocks passing through of air.In this closed system, negative electrode is not exposed among the air, and has stoped the transmission of gas.

When metal-air battery is placed in battery storage 50, be applied in the top 43 of metal-air battery from the predetermined strength of the eyelid retractor 54 of battery storage 50.Therefore, spring 24 is compressed and makes O-ring 28 form an inlet 60 with annular recess 42 separations.In this open system, air is imported into the air cathode 16 of metal-air battery through inlet, and produces electrochemical reaction so that electric energy to be provided.

When described metal-air battery when battery storage 50 is moved out of, spring is expanded once again and is made O-ring 28 embed annular recess 42 again and blocking-up air and the transmission that stops gas.

According to metal-air battery of the present invention, it provides at least one annular recess and corresponding O-ring, yet the present invention is not limited to this, also can use more than one annular recess and corresponding O-ring.O-of the present invention encircles to embed with shifting out corresponding annular recess and has determined closing with open of air intake, thereby the control battery system is for closing or opening.Therefore, it can improve the performance of metal-air battery and prolong its life-span.

Being preferred embodiment of the present invention only below, is not that the those of skill in the art in any this field are not deviating from the spirit and scope of the present invention in order to qualification the present invention, and change of being done and retouching all belong within the protection range of claims of the present invention.

Claims

1, a kind of metal-air battery, its have an anode and a negative electrode and place above-mentioned two electrodes between separator, this battery comprises:

One container, this container have the top inner surface and a below inner surface of described anode of the seasoning of being used for and described negative electrode;

One spring, this spring are arranged at described top inner surface;

One lid, this lid is used for electrically connecting described negative electrode, and this lid has at least one depressed part;

At least one O-ring, this O-ring are arranged at described below inner surface and towards described at least one depressed part;

Wherein when applying a predetermined strength, described spring is compressed and makes described at least one O-ring separate with described at least one depressed part, thereby forms an inlet and produce electrochemical reaction to import air; When removing this predetermined strength, described at least one O-ring embeds described at least one depressed part and blocks air.

2, according to the metal-air battery of claim 1, wherein said predetermined strength is applied by a battery storage.

3, according to the metal-air battery of claim 1, wherein said container is a tank container.

4, according to the metal-air battery of claim 1, it further comprises a ventilated membrane, this ventilated membrane be arranged at described negative electrode around and along the internal side wall of described container, thereby prevent the moisture content described battery of overflowing.

5, according to the metal-air battery of claim 4, wherein said ventilated membrane comprises a hydrophobic material.

6, according to the metal-air battery of claim 1, wherein said anode is to be made of zinc.